Tented vias in Autodesk Eagle CAD

by Mohit

If you were to choose Eagle’s default DRC (Design Rule Checking) settings, you’ll end up with non-tented vias. In order for the solder mask to be applied over the vias, you’ll need to make a small change in your DRC file. Below you can see that with the default DRC settings, all the vias have a solder mask around them.

not-tinted

Open your DRC file by either clicking on the DRC icon or by choosing it from Tools>DRC. Select the Masks subsection. Here you’ll find the Limit setting. Change this to the drill diameter of your via. I usually set it to 20mils so that all vias with drill holes equal to or less than 20mils will be covered with solder mask. Anything bigger than 20mils will have a solder mask applied to them.

drc-settings

Below you can see that the drill holes with diameter 20 mils and below are tinted and the bigger ones have solder mask applied around them.

tinted